Hose Connections - Vetus NLPH40 Instructions D'installation

Introduction
The Vetus exhaust system components are especially suit-
able for use in water-injected exhaust systems.
The maximum continuous operating temperature of the
plastic components of the exhaust systems is 70 degrees
C (158 degrees F).
• Fit a temperature alarm to warn of excessively hot
exhaust system temperature.
• If the quantity of injected coolant water is reduced
to in order to lower back-pressure in the exhaust
system, check that there is still sufficient water
injected when the engine is ticking-over. This
will prevent excess temperatures in the exhaust
system.
• Excess temperature can also be the conse-
quence of insufficient mixing of coolant water
with the exhaust gasses.
In general, good mixing is obtained by a virtually
vertically installed exhaust injection bend.
Poor mixing can also occur with an engine on
tick-over; especially when the coolant water
injection bend is installed virtually horizontally.
If necessary, take action. For example; by fitting
a water vortex or a water splitter in the exhaust
pipe, to improve the mixing of coolant water with
the exhaust gasses.
With water-injected exhaust systems, fit a hose of suitable
quality.
This hose must be reinforced, resistant to exhaust gasses,
high temperatures (100 degrees C, 212 degrees F) and oil.
Easy flexibility is essential for installation, while the hose
must not collapse when heated.
Vetus exhaust hose fulfils all the above requirements.
WARNING
If water enters the engine from the waterlock into the
exhaust system (for example: under sail when the
ship rolls or pitches heavily) this will lead to irrepara-
ble damage to the engine.
Too much water in the waterlock can effect engine
starting; drain off this water first. Too much water in
the waterlock can be also caused by repeated start-
ing attempts while the engine refuses to start.
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030419.03 030427.03
Installation
Installing waterlock NLPH
Instal the waterlock as horizontal as possible.
The waterlock 'IN'-connection must always remain below the level
of the exhaust injection bend! Position the waterlock 'back-to-front'
alongside the engine when there is insufficient space behind the
engine.

Hose connections

In order to achieve the ideal connection between the hoses and
the waterlock, both hose connections turn through 360 degrees.
NLPH40
NLPH45
NLPH50
NLPH60
NLPH75
NLPH90
Loosen the bolts before turning the hose connections!
Tighten the hose connections to a torque of 1 Nm (0.74 ft-lb, 142
oz-in).
The 2 halves of the housing can also be turned relative to each
other.
max. 2 x 30°
OUT
max. 2 x 30°
OUT
For a proper working it is essential that the OUT half of the hous-
ing and the inner part placed within this are in the relative posi-
tions as shown in the illustration. A deviation of maximum 30˚ to
either side is permitted.
The IN half of the housing may be placed in any position.
Make sure that IN and OUT are not interchanged with each
other while fitting!
360°
IN
360°
IN
Waterlock NLPH